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START-UP
Preliminary
Checks
1. Check that all internal wiring connections
are tight and
that all barriers, covers, and panels are in place.
2. Field electrical power source must agree with unit name-
plate rating.
3. All ._-_rvicevalves must be open.
4. Crankcase heater must be tight on compressor crankcase
(if equipped).
Leak Test
--
Field piping and fan coil must be leak tested
by pressure method. Use R-410A at approximately
25 psig
backed up with an inert gas to a total pressure not to exceed
245 psig.
NOTE:
Leak detectors
should be designed
to detect HFC
(hydrofluorocarbon)
refrigeranL
Evacuate
and Dehydrate
--
Field piping and fan coil
must be evacuated
and dehydrated
following good refrigera-
tion practices.
Start
Unit with
Operating
Test --
Turn power on to
the unit. Insert bar,ties
in remote control. Press the A
and
the %_ buttons on the remote conlrol for 5 seconds. The
remote control will be cleared and the time segment will dis-
play the Src 1=service test mode.
Press the _
button to transmit the service test signal to the
mail After the test has completed press the (_) button to leave
the test menu.
NOTE: When 30 seconds have elapsed and no buttons have
been pressed, the remote conlxol will automatically
exit the test
menu and resume its normal operation.
Configuring
Two
Indoor
Unit
Remote
Con-
trois
--
If two indoor units are being installed in the same
room, working independently,
two remote controls need to be
configured for proper operation.
UNIT CONFIGURATION
-- Turn the unit off by pressing
the (_.
Press and hold the M
and _'_. buttons of the re-
mote control for more than 5 seconds. The display will be
cleared and the time segments will display the first configura-
tion item (rAdr=remote
address) and the temperature segments
will display
the default
value
of this configuration
item
(Ab=control
of both indoor units). Press
A
and
V
to
change the default value to the new value of (a) or (b). Press the
=-._ button to transmit the new configuration
to the unit. Press
the (D
button to leave the configuration
menu.
REMOTE
CONTROL
CONFIGURATION
-- Turn the unit
off by pressing the (_)
button. Press and hold the V
and
_
buttons for more than 5 seconds.
The display will be
cleared and the time segments will display the first configura-
tion item (CH--remote address) and the temperature segments
will display
the default
value
of this configuration
item
(Ab=control
of both indoor units). Press
A
and
V
to
change the default value to the new value of (a) or (b). Press the
_
button to transmit
the new configuration
to the unit.
Press the (D
button to leave the configuration
menu.
NOTE: When 30 seconds have elapsed and no buttons have
been pressed, the remote control will automatically exit the test
menu and resume its normal operation.
SERVICE
Before performing
recommended
maintenance,
be sure
unit main power switch is turned off. Failure to do so may
result in electrical shock or injury form rotating fan blade.
Pumpdown
Procedure
-- The system may be pumped
down in order to make repairs on the low side without losing
complete refrigerant charge.
1. Attach pressure gage to suction service valve gage port.
2. Frontseat the mixed phase line valve.
The unit coils hold only the factory-designated
amount of
refrigerant.
Additional
refrigerant may cause
units to
relieve pressure through the compressor internal pressure
relief valve (indicated by a sudden rise of suction pressure)
before suction pressure reaches 20 psig. If this occurs, shut
off unit immediately then frontseat the suction valve and
remove and recover excess refrigerant following accepted
practices. Equipment damage may result.
3. Start unit and run until suction pressure reaches 5 psig.
4. Shnt unit off and frontseat suction valve.
5. Depressurize
low side of unit and recover refrigerant
following accepted practices.
Filter
Drier
(Field Supplied)
--Whenever
the filter
drier is exposed to the atmosphere it must be replaced. Only use
factory specified liquid-line filter driers with rated working pres-
sures less than 600 psig.
NOTE: Do not install a suction-line filter drier in the mixed
phase line.
Refrigerant
Charging
To prevent personal injury, wear safety glasses and gloves
when handling refrigerant. Do not overcharge system --
this can cause compressor flooding.
All units are shipped with the refrigerant charge listed on
nameplate.
NOTE: Do not vent or depressurize unit refrigerant to atmo-
sphere. Remove and recover refrigerant
following
accepted
practices.
13
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